基于FPGA的高速数据转存系统

SAR雷达前端数据采集系统速度与存储系统容量的日益提高，对数据转存系统的性能提出了更高的要求以Xilinx公司Virtex-5系列FPGA为硬件平台，基于PCI—E协议与Aurora协议提出了一种高速数据转存系统解决方案．在Aurora协议基础之上，自定义了一种可靠的帧格式；利用双口RAM对数据进行缓存，以乒乓方式操作，确保了在输入、输出数据传输速率不匹配情况下数据传输的稳定性与可靠性：转存系统与PC通过PCI-E总线进行通信，命令交互采用PIO模式，图像与列表数据传输采用DMA模式．经实际测试，该方案能够满足某型号SAR雷达系统对高速数据转存的要求．

High Speed Data Transfer and Storage System Based on FPGA

With the increasing capacity of the storage system and the speed of the SAR radar front-end data acquisition, the higher request of the performance of data transfer and storage system is put forward. A solution of high speed data transfer and storage system based on the PCI-E and the Aurora protocol using the hardware platform ofXilinx＇s Virtex-5 series FPGA is proposed. Customizing a reliable frame format on the basis of Aurora protocol. Using the dual-port RAM for data cache and operating in ping-pang mode ensures the stability and reliability of the data transfer in the case of transfer speed mismatch of the input and output data. The transfer and storage system and PC via the PCI-E bus for communicating, command interaction using the PIO mode and image and list data transfer using the DMA mode. Actual test shows this solution can meet the request of a type of SAR radar system for high speed data transfer and storage.